Eyeglass-bridge.



PATENTEB MAR. 6, 1906.

W. H. ELY. EYEGLASS BRIDGE. APPLIGATIUN FILED DE0.23.1904.

f ,ver a? forvzey.

UNITED STATES PATENT OFFICE.

EYEeLAss-BHIDG'E.

. Specification of Letters Patent.

Patented March 6, 190B.

Application filed December 23. 1.904. Serial No. 288,08@

'plane of the tops of the studs, to have the spring of the arch low, tohave the arch con- .orin to the lines ofthe nose, and to have the crestofthe arch close to' the skin,so that the bridge will be inconspicuousand apparently specially fitted to the nose of the wearer.

It is essential that bridges of this nature have sufficient resilienceto permit the guards come useless.

to be separated widely enough to allow them to be easily applied to thenose without dan gr`of breaking the bridge or so strainin the metal thatit will lose its elasticity an be- In the prior structures in whichattempts have been made to` keep the bridge low to the spring of thearch'V .d to eflect a close fit either there Vis not enough elasticity`orlin.- order to provide suiiicient resilience,

strength, and security7 various unsightly and a O impracticable coils,ops, and bends have n employed which, owing to kconstant b y oaning inuse,soon become so stranieri that bridge thatV may be made of theordinary materia 'commer-ce, whichwill set low, have little arch i 4oand conform closely to the nose, and yet wil in lace.

e metal breaks at the bends or loses its elasticity. l i

The cject of this invention is to produce a s and used with the commonstuds of have abundant strength, much elastic1ty, and will open in anapproved mannerinorder that the guards may e suliciently separated toallow easy application to the nose and the lenses surely returned totheir ngormal ositions in iront of the Veyes and beiirmly eld o this endthe invention resides in a bridge formed of a strip of at or oval metalhaving an arch springing at any angle with compound coils 1n front ofthe ends ofthe arch, all portions of which are in substantially the sameplane, and short Stud ends that are torsional] twisted inthe coils so asto extend downwar 1y from theinside near the lcenter of the coils.

. vertical p ane o the lenses.

can be made in this thin strip of hard sprin Figure 1 ci theaccompanying drawings shows an elevation of a .bridge that embodies theinvention attached Ato a pair of common vertically-o iening studs. Fig..2 shows a front view o the bridge. Fig. 3 shows s plan ol the bridge.Fig. 4 shows a section on the lane indicated bythe line .4 4 on Fig. 3,and

ig. 5 shows a section on the plane indicated by the line'' on Fig. 3.

This brid e may be formed oli-a narrow thin strip o gold, steel,nickel,`or the other metalscomnionlyused. The arch 6 is curved so as tosprin outwardly and upwardly but ver little. t is preferred to only haveit sprlng Vjust sufficiently to clear the nose, with its Wider facesextending parallel with the line ofthe nose. At each end of the arch thestrip is curved to form an outer coil 7' and an i'nner coil l8. Allportions of these coils are made in the saine plane and are preferablyin the plane of the spring of the arch, so that -When the bridge islooked at from directly in front, as shown in Fig. 2, it ap ears as anarrow strip, the coils not being istlnguishable 'from thearch.

Eachend 9 of the stri is given a torsional twist 10 in the inner coi sothat the end will project downwardly With its wider faces extendin atyright angles to the -vertical lane of the enses in order that it maybe tust' into'and secured in the ordinary verticallyopeni stud 11 oicommerce. The character of t e torsional twist iven to the ends'determines the angle at vrV ich the arch will project u ward] ,l andoutwardly from the A short bendl metal if it is made torsionally. Ashort permits small coils, and by employin two the coils may be madeclose, and yet su cient elasticity will be provided toV enable thelensesto be Widely o cned for separating the -arde Without brea ingvthe metalwhere it 1s bent or straining the coils beyond the limit of elasticitWith the compound coils the opening o the lenses and s reading of theguards causes the coils to wind upon-themselves, and thus check anytendency to over strain the coils or the bend, and with the compoundcoils the torsional twist given to the stud ends may be made entirelywithin the inner coil, so that it is not visible when looked at from thefront and so that the coils may be brought down close to the studswithout affecting their elasticity. The use. of compound coils not onlypermits sniall coils IOO and the making of e close torsional twist forthe ends, but also allows the ends to be brought down near the center ofthe eoils, so that the coils will have suflicient flexibility withoutinterfering with the braces on the studs.

This bridge is low `and een be eheapl made of the common materials. Thearch has but little spring, and it conforms to the outline of the nose.This bridge has a great deal of elasticity and strength and allows the Vlenses to be opened Widely and fre uently in an approved manner Withoutanger of straining or breaking where it is bent and twisted and the endsof the bridge are easily adapted to be inserted into any of the com monforms of studs.

The invention claimed is- -1. An eye lass-bridge formed of a flattenedstrip o thin spring metal having an interrnediate connecting portion, anouter coil at eaeh end, an inner eoil within eaeh outer coil, said coilslying in the same plane, and the attaching ends torsionally lient andeX- tending downwardly lrorn the inner ends of the inner eoils and withtheir wider faces extending in planes transversely of the planes ofthecoils.

2. An eye lass-bridge 'formed of a flattened strip o' thin, spring metalhaving arf areh7 an outer coil at eaeli end ofl the areli, an inner coilwithin each outer coil, and a tor sionallytwisted stud end extendingdownwardly from each inner coil, substantially as specifiedY WILLIAM lllELY.

Witn esses:

RnvILo C. MARKHAM, EDWARD A. TREDWAY

